Mix design of high-volume fly ash ultra high performance concrete

  • Nguyen Van Tuan Faculty of Building materials, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam http://orcid.org/0000-0001-7385-4400
  • Pham Sy Dong Faculty of Building materials, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Le Trung Thanh Vietnam Institute for Building Materials, 235 Nguyen Trai road, Thanh Xuan district, Hanoi, Vietnam
  • Nguyen Cong Thang Faculty of Building materials, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
  • Yang Keun Hyeok Department of Architectural Engineering, Kyonggi University, Suwon, Gyeonggi-do, Republic of Korea
Keywords: high volume fly ash, ultra-high performance concrete, mix design, packing density, curing condition

Abstract

The addition of supplementary cementitious materials (SCMs) to replace cement, especially with a high volume (> 50%), is an effective way to reduce the environmental impact due to the CO2 emissions generated in the production of ultra-high performance concrete (UHPC). Unfortunately, no official guidelines of UHPC using a high volume of SCMs have been published up to now. This paper proposes a new method of mix design for UHPC using high volume fly ash (HVFA), that is referred to the particle packing optimization of the Compressive Packing Model proposed by F. de Larrard. This proposed method also considers the heat treatment curing duration to maximize the compressive strength of HVFA UHPC. The experimental results using this proposed mix design method show that the optimum fly ash content of 50 wt.% of binder can be used to produce HVFA UHPC with a compressive strength of over 120 MPa and 150 MPa under standard curing and heat treatment, respectively. Moreover, the embodied CO2 emissions of UHPC reduces 56.4% with addition of 50% FA.

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Published
31-10-2021
How to Cite
Tuan, N. V., Dong, P. S., Thanh, L. T., Thang, N. C., & Hyeok, Y. K. (2021). Mix design of high-volume fly ash ultra high performance concrete. Journal of Science and Technology in Civil Engineering (STCE) - HUCE, 15(4), 197-208. https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-17
Section
Research Papers